It's called Inflammatory Breast Cancer, or IBC.
And no, neither had I. But here's the scary thing: In October, during Breast Cancer Awareness Month, you'll see pink-ribbon campaigns everywhere (including on my favorite sweet treat, Dove Dark Chocolate Promises -- which, btw, are on sale for two for $6 at Walgreen's with an October coupon) and many exortations to do self-examinations and get a mammogram -- but nary a mention of this rare but especially deadly form of cancer.
Here's a National Cancer Institute fact sheet with signs and other information. The most common symptoms are a red, itchy and/or swollen breast (doctors frequently misdiagnose it as bug bites), inverted nippes, and pain or tenderness. Other sympoms are listed on the Mayo Clinic site. And, here's a news clip that shows what some symptoms may look like, and discusses how little awareness there is out there of this form of breast cancer.
So, bottom line: Don't panic, just be aware, and take all the prescribed precautions.